# probability distribution question

**Question description**

A survey found that 29% of phone users have no landline, only cellphones. Suppose we take a random sample of 12 phone users: What is the probability that 3 users only use cellphones? The probability that AT LEAST 5 users only use cellphones? Find the mean and standard deviation of the probability distribution of those who are cellphone only.

## Tutor Answer

**Quality**

**Communication**

**On Time**

**Value**

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors